20512781380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{490033}}^1$

素因数の和:490085

約数の個数: 96

約数和(自身を含む): 55322878464

約数和(自身を除く): 34810097084

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 23, 26, 28, 35, 46, 52, 65, 70, 91, 92, 115, 130, 140, 161, 182, 230, 260, 299, 322, 364, 455, 460, 598, 644, 805, 910, 1196, 1495, 1610, 1820, 2093, 2990, 3220, 4186, 5980, 8372, 10465, 20930, 41860, 490033, 980066, 1960132, 2450165, 3430231, 4900330, 6370429, 6860462, 9800660, 11270759, 12740858, 13720924, 17151155, 22541518, 25481716, 31852145, 34302310, 44593003, 45083036, 56353795, 63704290, 68604620, 78895313, 89186006, 112707590, 127408580, 146519867, 157790626, 178372012, 222965015, 225415180, 293039734, 315581252, 394476565, 445930030, 586079468, 732599335, 788953130, 891860060, 1025639069, 1465198670, 1577906260, 2051278138, 2930397340, 4102556276, 5128195345, 10256390690, 20512781380]

約数ペア:

[(1, 20512781380), (2, 10256390690), (4, 5128195345), (5, 4102556276), (7, 2930397340), (10, 2051278138), (13, 1577906260), (14, 1465198670), (20, 1025639069), (23, 891860060), (26, 788953130), (28, 732599335), (35, 586079468), (46, 445930030), (52, 394476565), (65, 315581252), (70, 293039734), (91, 225415180), (92, 222965015), (115, 178372012), (130, 157790626), (140, 146519867), (161, 127408580), (182, 112707590), (230, 89186006), (260, 78895313), (299, 68604620), (322, 63704290), (364, 56353795), (455, 45083036), (460, 44593003), (598, 34302310), (644, 31852145), (805, 25481716), (910, 22541518), (1196, 17151155), (1495, 13720924), (1610, 12740858), (1820, 11270759), (2093, 9800660), (2990, 6860462), (3220, 6370429), (4186, 4900330), (5980, 3430231), (8372, 2450165), (10465, 1960132), (20930, 980066), (41860, 490033)]